Advanced Composites and Hybrid Materials
·
2021
·Vol. 5
·期 1
·195-208
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IF 5.693
Luo Xin,Lai Hua,Cheng Zhongjun,Liu Pengchang,Li Yufen,Liu Yuyan
Smart slippery surfaces with intelligent liquid droplet manipulation performance have aroused much attention. The lubricant and surface microstructure are two key factors that govern the droplet’s sliding performance. However, for almost all existing surfaces, only one factor can be regulated, which significantly limits their wetting performances and applications. Herein, by integrating the temperature-responsive lubricant and shape memory surface microstructure, we report a novel slippery surface. On this surface, the solid/liquid phase transition of the lubricant provides the surface with the ON/OFF control for droplet’s movement between the sliding state and pinning state, and the tunable surface microstructure based on material’s shape memory effect offers the programmable sliding directions. Due to the combined effect, diverse liquid transportation programs with random ON/OFF manner and arbitrary direction were further demonstrated on this surface. This work advances a new slippery surface with controllable lubricant and surface microstructure, which not only provides insights into the design for smart slippery surfaces but also provides a promising material for application in smart control of droplet motion. Graphical abstract
A novel shape memory slippery surface is prepared, on which both the lubricant and surface microstructure can be reversibly controlled.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Lei Tang,Tongchang Wang,Zhixiang Zeng
Materials require specific surface structures to achieve the best performance, but achieving an optimal structural design requires a systematic study of how structure affects performance. In this work, we comprehensively and systematically investigated the structure–activity relationship between the nanowire structure and the oil dewetting self-cleaning performance. It is easy for an oil droplet to enter this structure, but it is difficult for it to escape from the gaps between the structures even under the action of water. So, the oil dewetting ability is greatly reduced, showing that this “easy to enter and difficult to exit” mode is very disadvantageous for oil desorption. Moreover, if the structure is dissolved during the test, the oil dewetting ability will be restored. The desorption effect is affected by structural parameters and reaction conditions, which further verifies the negative effect of this structure. In contrast, copper(II) oxide nanowires completely lose their self-cleaning ability due to the enhancement of hydrophobicity and oleophilicity, and the larger-diameter copper(II) oxalate nanorods exhibit a “difficult to enter and difficult to exit” mode, leading to the partial recovery of the oil dewetting performance. This study helps us deeply understand the influence of the surface microstructure on the oil dewetting performance and lay a solid foundation for further appropriate structural design.
研究领域:
材料科学
·
表面化学
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产品关联
DOI
PubMed
高影响因子
VETERINARY PARASITOLOGY
·
2024
·
IF 2
Bohan Wang,Jiali Meng,Xiaoxiao Qi,Penglong Wang,Qi Liu,Lifang Wang,Weiwei Sun,Baoliang Pan
Surface hydrophobicity of organisms provides biological self-protection. The hydrophobicity of pest surface, acting as a main obstacle for the pest control, can lead to low utilization and high loss of pesticides. Dermanyssus gallinae is a notorious pest in egg-laying hens, whose control primarily depends on acaricide spraying, while its surface hydrophobicity and potential influence on pesticide effectiveness are not clear. In the present study, the contact angle measurements revealed that the surface of D. gallinae was hydrophobic. Analysis using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that the surface microstructures of D. gallinae consist of cuticular folds, with a lipid-rich outermost layer of the cuticle. Based on gas chromatography-mass spectrometry (GC-MS) and gas chromatography (GC), it was found that the major compositions of cuticular lipids were fatty acids and n-alkanes. Modifying the chemical compositions and microstructures of the D. gallinae surface resulted in a reduction in surface hydrophobicity and an increase in the permeation of Rhodamine B through the cuticle. This observation suggested that the chemical compositions and microstructures were pivotal in determining surface hydrophobicity, hindering compound penetration into the cuticle. Finally, it was found improving the wettability of pesticide solution by adding surfactants could overcome the surface hydrophobicity and enhance the efficacy of pesticide against the mites. This study sheds light on the surface hydrophobicity mechanism of D. gallinae and provides a novel strategy to improve the efficacy of acaricides against the mites.
研究领域:
昆虫学
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害虫防治
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动物学
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产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Wei He,Ru Yan,Xiang Gao,Yan Wang,Xinxiao Sun,Houyi Ma
Most Zr conversion coatings are prepared on Al alloys , with Al 3+ from the substrate contributing significantly to the film growth process. Thus, the effect of Al 3+ on the electrochemical characteristics, surface microstructure and film-formation mechanism of Zr-based conversion coatings on old- rolled steel (CRS) substrates was investigated by growing the coatings with and without Al 3+ as an additive. Electrochemical tests indicated that the anticorrosion performance of the Zr-Al coatings prepared in the presence of Al 3+ was greatly superior to that of Zr conversion coatings obtained in the absence of Al 3+ . Field-emission scanning electron microscopy and X-ray photoelectron spectroscopy analysis indicated that adding of Al 3+ in the conversion bath changed the surface microstructure of the Zr coating, greatly promoted the deposition of Zr and F on the CRS substrate and increased the film thickness and density. Both coatings were embedded into the etched CRS substrates. The presence of Al 3+ additive induced the formation of different coating components . The Zr coating mainly consisted of ZrO 2 and some FeF x , whereas the Zr-Al coatings comprised of ZrO 2 , ZrO x F y , Al 2 O 3 , AlF x and some FeF x . The present study results confirm the key role of Al 3+ as an additive in the film formation and growth process of Zr coatings and its effect on enhancing the anticorrosion performance of CRS substrates in NaCl solutions.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 37
·21123-21131
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IF 12.732
You Xu,Mengying Liu,Tianlun Ren,Shengqi Wang,Tiantian Liu,Ziqiang Wang,Xiaonian Li,Liang Wang,Hongjing Wang
The hydrogen evolution reaction (HER) is the crucial cathodic half-reaction in electrocatalytic water splitting systems. The development of highly efficient catalysts that can trigger proton reduction with minimal overpotential and have fast kinetics is pivotal for sustainable hydrogen production by means of the HER. Crystal phase engineering and surface functionalization as feasible strategies have attracted growing interest in modulating the HER reactivity of metal-based catalysts. Herein, polyethylenimine-modified Pd2B mesoporous nanoparticles (Pd2B@PEI mNPs) with a stable hexagonal close-packed (hcp) phase were rationally designed and successfully prepared by a two-step strategy using Pd mesoporous nanoparticles as the starting material. With the dominant HER-active hcp Pd boride phase and modified surface micro-structure (e.g., increased interfacial proton concentration), the electrocatalytic activity of the as-prepared Pd2B@PEI mNPs for hydrogen evolution in acid electrolyte exceeds those of unmodified Pd2B mNPs and even commercial Pt/C. This study provides new insights for catalyst design through collaborative interface engineering and component modulation.
研究领域:
材料科学
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电化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Pengbin Gui,Yanming Sun,Liangpan Yang,Zhaosheng Xia,Shuxin Wang,Zhouyin Wang,Zhiliang Chen,Wei Zeng,Xingang Ren,Siliang Wang,Guojia Fang
Metal halide-perovskite-based photodetectors have recently emerged as a class of promising optoelectronic devices in various fields. Meanwhile, nano/microstructuring perovskite-based photodetectors are a facile integration with complementary metal-oxide semiconductors for miniaturized imaging systems. However, there are still challenges to be overcome in reducing the losses caused by light reflection on the surface of microstructural perovskites. In this work, surface microstructure engineering is employed in MAPbBr3 microsheets for reducing light reflection and improving light absorption, resulting in high-performance perovskite photodetectors. MAPbBr3 microsheets, which possess different surface morphologies of flat, upright hemisphere arrays and inverted hemisphere arrays (IHAs), are fabricated by a simple microstructure template-assisted space confinement process. The light absorption capacity of IHA MAPbBr3 is significantly higher than that of the other two structures. Hence, IHA photodetectors with excellent figures of merit, including low dark current, decent responsivity, and fast speed, are achieved. Furthermore, the noise of the IHA photodetectors is only ∼10–13 A/√Hz, which results in the superior sensitivity for weak light detection with a specific detectivity up to 1011 Jones. Our results demonstrate that surface engineering is a simple, low-cost, yet effective approach to improve the performance of nano-/micro-optoelectronic devices.
研究领域:
材料科学
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光学工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
ECS Journal of Solid State Science and Technology
·
2021
·Vol. 10
·期 9
·091011
·
IF 2.07
Zhaoli Yin,Dongliang Wu,ZeXia Zhang,Ruliang Zhang
Design and adjustment of surface microstructure is an essential step forward in enhancing the interfacial properties of carbon fiber composites. Based on the classical Sol-Gel method, the silica was successfully introduced on the carbon fiber (CF) surface by the In-situ growth strategy. Scanning electron microscopy (SEM) and Electron Probe Microanalysis (EPMA) showed squid-like tentacle-like silica protrusions covered the CF surface uniformly. Fourier transform infrared spectra (FT-IR) result showed that the In-situ growth method introduced more silica on the CF surface. The interfacial layer is well preserved under mild condition and the tensile strength of CF increased by a 4.42%. Additionally, this investigation has the potential value not only focus on improved its smooth surface and chemical inertness but also solved the problems such as non-dispersible silica and time-consuming during the preparation process.
研究领域:
材料科学
·
复合材料
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DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Xilin Liao,Hai-Tao Ren,Baolei Shen,Jia-Horng Lin,Ching-Wen Lou,Ting-Ting Li
In this work, TiO 2 nanofiber membrane (NFM) with a complete surface microstructure was prepared through regulating the surface microstructure of TiO 2 NFM by doping Zr. The crystal structures and morphological analyses indicated that the nanofiber membranes were consisted by disordered accumulation of Zr-doped TiO 2 nanofibers with a crack-free surface, small grain size and high aspect ratio . When the doping amount of Zr was 0.8 mL, the tensile strength of the doped membranes reached 1.27 MPa, which was 60.7% higher than that of pure TiO 2 NFM. The photocatalytic performance of Zr-doped TiO 2 NFM was evaluated by the degradation performance of Methylene orange (MO) under simulated sunlight irradiation. Compared with the undoped TiO 2 NFM, the 0.8-Zr/TiO 2 NFM presented a higher catalytic degradation efficiency (improved by 69.6%), and the photocatalytic performance maintained stable after five circulating. It was found that the doping of Zr ions effectively limited the surface crack size and grain size of TiO 2 nanofibers, thereby improving the tensile strength, and enhanced the surface area effect and carrier transfer efficiency of TiO 2 NFM. On the other hand, a narrow band-gap was obtained by doping a small amount of Zr ions, which expanded the visible light response range to improve the photocatalytic performance of TiO 2 nanofibers.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xinghua Wu,Yutong Pan,Zhaokang Han,Yizhou Shen
To address the issues caused by ice accretion, researchers have made various attempts to obtain anti-icing surfaces, among which superhydrophobic surfaces have been approved to be an ideal candidate for anti-icing applications. Although extensive research has been conducted to date, the relationship between the anti-icing performance and the anti-condensation performance of superhydrophobic surfaces has yet to be investigated. In this study, superhydrophobic coatings with different surface microstructures were prepared. Tuning of surface morphology was conducted by controlling molar ratio of SiO 2 nanoparticles and polyester powders. The superhydrophobic coatings with uniform surface microstructures exhibit anti-condensation performance. Superhydrophobic coatings with cavities-pore combined surface structures demonstrated superior anti-icing performance to other coatings. The relationship between the anti-icing and anti-condensation performance was investigated. It is verified that the anti-condensation performance of the superhydrophobic surface do not have a simple correlation with the anti-icing performance. Furthermore, the coatings present oil repellency, durable superhydrophobicity and anti-fouling properties.
研究领域:
材料科学
·
表面工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Hongen Chen,Jianzhuang Shi,Changbin Ji,Wenxin Fan,Kunyan Sui
The construction of surface microstructures (e.g., micropyramids and wrinkles) has been proven as the most effective means to boost the sensitivity of ionic skins (I-skins). However, the single-scale micronano patterns constructed by the common fabrication strategy generally lead to a limited pressure-response range. Here, a convenient repeated stretching/coordinating/releasing strategy is developed to controllably construct multiple graded wrinkles on the polyelectrolyte hydrogel-based I-skins for increasing their sensitivity over a broad pressure range. We find that the small wrinkles allow for high sensitivity yet small pressure detection range, while the large wrinkles can reduce structural stiffening to generate large pressure-response range but incur limited sensitivity. The multiple graded wrinkles can combine the merits of both the small and large wrinkles to simultaneously improve the sensitivity and broaden the pressure-response range. In particular, the sensing performance of multiple-wrinkle-based I-skins substantially outperforms the superposition of the sensing performance of different single-wrinkle-based I-skins. As a proof of concept, the triple-wrinkle-based I-skins can provide an extremely high sensitivity of 17,309 kPa–1 and an ultrawide pressure detection range of 0.38 Pa to 372 kPa. The approach and insight contribute to the future development of I-skins with a broader pressure-response range and higher sensitivity.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 105
·86387-86392
·
IF 3.84
F. Wang,H. L. Zhu,H. P. Zhang,H. Y. Tang,J. Y. Chen,Y. H. Guo
This study aims at manipulating the surface microstructure of polytetrafluoroethylene (PTFE) microporous materials via a novel casting–lyophilization–calcining (CLC) process. In the CLC process, the emulsion consisting of polyvinylidene fluoride (PVDF), sodium dodecyl benzene sulfonate (SDBS) and distilled water was firstly poured onto the surface of the PTFE microporous materials and then the PTFE materials covered by the emulsion were sintered after removal of the distilled water by lyophilization. The results indicate that a compact thin PVDF layer can be easily constructed on the surface of the PTFE microporous materials by controlling the wetting state transition, which can be easily handled by regulating the SDBS concentration in the CLC process. The bubble point is enhanced owing to the compact PVDF layer on the surface, leading to a higher collection efficiency. In addition, the average pore size, porosity and thickness can be easily manipulated by controlling the SDBS concentration and PVDF mass fraction. Finally, the filtration mechanism changes from depth filtration to surface filtration, which brings about a higher air flux recovery. We hope such a novel process could be potentially useful in the surface microstructure regulation of polymer microporous materials with low surface energy.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Ziqing Ouyang,Yongkang Yan,Yiqiang Long,Bingjun Luo,Zhengliang Su,Jiangyou Long
Multiscale copper-based surface microstructures are required in miniaturized two-phase heat exchange devices. In this study, we propose a method that combines picosecond laser micromachining and electrodeposition to prepare copper-based two-tiered surface microstructures. The surface structures consist of periodic mini-grooves covered by dense microcones. The mini-grooves, prepared using ultrafast laser micromachining, offer a superior capillary transport performance. On the other hand, the microcone structures, prepared by electrodeposition, provide more effective nucleation sites for liquid–vapor phase changes. Compared to single-tiered mini-groove structures, the minigroove-microcone composite structures demonstrate an 8.2% increase in critical heat flux (CHF) and a 21–58% increase in heat transfer coefficient (HTC) during capillary-fed boiling tests. The method presented in this study introduces a new approach for fabricating high-performance wick structures suitable for ultrathin two-phase heat exchange devices.
研究领域:
材料科学
·
热能工程
·
微制造技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）